Type species Hartman (1957: 256) states O. cuvieri as Aricia sertulata was the first species attributed to Aricia Savigny, and that thus "the genotype of Orbinia can be only O. cuvieri". This is not correct. Aricia sertulata is for all time the type species of Orbinia by monotypy, regardless if a later worker synonymises it (here A. sertulata is in any case the senior name). Synonymy is subjective and can change, type species are permanently decided by circumstances.
It appears Quatrefages did not know Aricia was a junior homonym as he (quite wrongly) continued Aricia for other species. Pettibone (1957: 159) comments on the confusion and correctly states Quatrefages by present day practice should have done the opposite - place the other names under Orbinia and left A sertulata, which Savigny (wrongly) stated had small antennae, in Aricia. [details]

Descriptive notes

description ORBINIINAE with pointed prostomium and first...

description ORBINIINAE with pointed prostomium and first pair of branchiae on setiger 5-9. Posterior thoracic parapodia with several accessory papillae and numerous ventral papillae; with a combined total of at least five papillae on each segment. Thoracic neurosetae include hooks (or subuluncini) and crenulated capillaries. Furcate and capillary setae present in abdominal notopodia. [details]

additional source Bellan, Gerard. (2001). Polychaeta, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels. 50: pp. 214-231. (look up in IMIS) [details]

additional source Brunel, P.; Bosse, L.; Lamarche, G. (1998). Catalogue of the marine invertebrates of the estuary and Gulf of St. Lawrence. Canadian Special Publication of Fisheries and Aquatic Sciences, 126. 405 p. (look up in IMIS) [details]Available for editors[request]

Type species Hartman (1957: 256) states O. cuvieri as Aricia sertulata was the first species attributed to Aricia Savigny, and that thus "the genotype of Orbinia can be only O. cuvieri". This is not correct. Aricia sertulata is for all time the type species of Orbinia by monotypy, regardless if a later worker synonymises it (here A. sertulata is in any case the senior name). Synonymy is subjective and can change, type species are permanently decided by circumstances.
It appears Quatrefages did not know Aricia was a junior homonym as he (quite wrongly) continued Aricia for other species. Pettibone (1957: 159) comments on the confusion and correctly states Quatrefages by present day practice should have done the opposite - place the other names under Orbinia and left A sertulata, which Savigny (wrongly) stated had small antennae, in Aricia. [details]

From other sources

description ORBINIINAE with pointed prostomium and first pair of branchiae on setiger 5-9. Posterior thoracic parapodia with several accessory papillae and numerous ventral papillae; with a combined total of at least five papillae on each segment. Thoracic neurosetae include hooks (or subuluncini) and crenulated capillaries. Furcate and capillary setae present in abdominal notopodia. [details]